PLATTSBURGH -- Big Sky Airlines will start offering service between Boston's Logan International Airport and two North Country airports on Oct. 31.

On Tuesday, Delta Air Lines released the schedule of Delta Connection flights to and from Plattsburgh International Airport and Adirondack Regional Airport by Big Sky.

There will be three flights each way on weekdays, two flights on Sundays and one flight on Saturdays.

In a Delta press release, Big Sky President Fred deLeeuw said: "Big Sky is excited to continue its expansion in the Northeast as part of the Delta Connection family. As we grow with Delta, we reaffirm our commitment to providing customers with the same safe, reliable service Big Sky has been known for over its 29 years of operation."

At Logan, travelers can connect with up to 124 daily Delta, Delta Connection and Delta Shuttle flights to 38 non-stop destinations. Delta is also a member of the Sky Team global alliance, which allows its customers non-stop flights to Europe on Air France and Alitalia.

The schedule is a good one, deLeeuw said, as it allows travelers to easily make connections. One-way fares to Boston start at $109, he said.

"As Boston's largest carrier in terms of flights and destinations, Delta is pleased to continue expanding the choices offered to our customers by launching this service between Boston, Saranac Lake and Plattsburgh," said David Bishko, Delta's staff vice president of alliances.

Tickets are now available for the flights at Delta.com and through other ticketing services, deLeeuw said. A direct link is available at the Plattsburgh International Airport Web site: www.flyplattsburgh.com.

Plattsburgh-North Country Chamber of Commerce President Garry Douglas said Delta was targeted because of the success of its Big Sky service in Bellingham, Wash.

"We met with Delta in Sen. (Charles) Schumer's Washington office in December, leading to a site visit by Big Sky in January and now the start of what we hope may be additional Delta services in the years to come."

Big Sky was approved to provide Essential Air Service to the two airports by the U.S. Department of Transportation last month. The airline will receive a subsidy of $2.4 million to provide that service.

Big Sky will use 19-seat Beechcraft 1900D Aircraft for the flights, the same type of plane CommutAir uses for its Continental Connection flights under the Essential Air Service contract that Big Sky is taking over.

The last Continental Connection flights by CommutAir from Plattsburgh International and Adirondack Regional will be on Oct. 30. The transition negotiations between CommutAir and Big Sky went very smoothly, deLeeuw said.

"We have a very good working relationship with CommutAir."

Several CommutAir employees will be joining the Big Sky team, deLeeuw said.